Barreled trichlorosilane discharging device in liquid polycarbosilane production process

Abstract

The utility model discloses a barreled trichlorosilane discharging device in the production process of liquid polycarbosilane, which structurally comprises a trichlorosilane built-in barrel, a pneumatic diaphragm pump and a storage tank, a connecting pipeline is arranged between the trichlorosilane built-in barrel and the pneumatic diaphragm pump, the connecting pipeline comprises a liquid pumping pipe, and the liquid pumping pipe is connected with the storage tank. The liquid pumping pipe is connected with the trichlorosilane built-in barrel through a barrel cover sealing device, the barrel cover sealing device comprises a threaded seat, a threaded pressing block and a stainless steel gasket, the threaded seat is connected with the trichlorosilane built-in barrel, and a polytetrafluoroethylene gasket is arranged between the threaded seat and the trichlorosilane built-in barrel. The threaded pressing block is in threaded connection with the threaded seat. After the technical scheme is adopted, the barrel cover sealing device is designed, so that the air tightness is guaranteed, and the environment is prevented from being influenced by leakage, and the physical and psychological health and potential safety hazards of staff are avoided; the pressure balancing device is mounted on the trichlorosilane built-in barrel, so that micro-positive pressure and pressure balance in the liquid pumping process are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of liquid polycarbosilane processing technology, and in particular to a barrel-type trichlorosilane discharge device for the liquid polycarbosilane production process. Background Technology

[0002] In the existing methanolization process of liquid polycarbosilane production, a pneumatic diaphragm pump is used to draw trichlorosilane from a built-in trichlorosilane tank into a storage tank. During this drawing process, because the pneumatic diaphragm pump is inserted directly into the drawing port and the drawing port of the built-in trichlorosilane tank has no sealing structure, trichlorosilane gas will be released, affecting the environment and causing physical and mental health and safety hazards to employees. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a device for discharging barrelled trichlorosilane in the production process of liquid polycarbosilane.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a barrelled trichlorosilane discharge device for the production process of liquid polycarbosilane, the structure of which includes a trichlorosilane built-in barrel, a pneumatic diaphragm pump connected to the trichlorosilane built-in barrel, and a storage tank connected to the pneumatic diaphragm pump. A connecting pipe is provided between the trichlorosilane built-in barrel and the pneumatic diaphragm pump. The connecting pipe includes a liquid extraction pipe extending into the trichlorosilane built-in barrel. The liquid extraction pipe is connected to the trichlorosilane built-in barrel through a barrel lid sealing device. The barrel lid sealing device includes a threaded seat, a threaded pressure block, and a stainless steel gasket. The threaded seat is connected to the trichlorosilane built-in barrel and a PTFE gasket is provided between the two. When the stainless steel gasket and the O-ring are embedded into the threaded seat, the threaded pressure block is threadedly connected to the threaded seat.

[0005] Preferably, the connecting pipe further includes a first stainless steel fluoropolymer-lined hose connected to the pneumatic diaphragm pump via an inlet valve, and the other end of the first stainless steel fluoropolymer-lined hose is connected to the liquid extraction pipe via a flange.

[0006] Preferably, the other end of the pneumatic diaphragm pump is connected to the storage tank via a second stainless steel fluoropolymer-lined hose, and an outlet valve is provided on the side of the pneumatic diaphragm pump near the second stainless steel fluoropolymer-lined hose.

[0007] Preferably, the lid of the trichlorosilane internal tank is provided with a liquid extraction port for threaded connection of a threaded seat.

[0008] Preferably, the trichlorosilane internal tank is equipped with a pressure balancing device.

[0009] Preferably, the pressure balancing device includes a three-way connector connected to the trichlorosilane inner tank and a gas source pipe connected to the three-way connector. The top port of the three-way connector is provided with a first ball valve, and the side port of the three-way connector is provided with a second ball valve. A pressure gauge is connected to the first ball valve, and the other end of the second ball valve is connected to a nitrogen pressure regulating valve through the gas source pipe.

[0010] Preferably, a quick-connector for the air pipe is provided between the second ball valve and the air source pipe.

[0011] Preferably, the lid of the trichlorosilane inner container is provided with a vent, and the bottom port of the three-way connector is threadedly connected to the vent.

[0012] Preferably, the gas source pipe is a PU flexible hose.

[0013] Preferably, the pneumatic diaphragm pump is a corrosion-resistant pneumatic diaphragm pump, the liquid extraction tube is made of PE, and the threaded seat and threaded pressure block are both made of 304 stainless steel.

[0014] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0015] 1. The present invention provides a barrel-type trichlorosilane discharge device for the production process of liquid polycarbosilane, which is designed with a barrel lid sealing device to ensure gas sealing and prevent leakage that could affect the environment and cause health and safety hazards to employees.

[0016] 2. The present invention provides a barrel-type trichlorosilane discharge device for the production process of liquid polycarbosilane, which ensures a slight positive pressure and pressure balance during the pumping process by installing a pressure balancing device on the trichlorosilane inner barrel. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a barrel-type trichlorosilane discharge device for the production process of liquid polycarbosilane according to this utility model;

[0019] Figure 2 This is an exploded view of the barrel lid sealing device of a barrel-packaged trichlorosilane discharge device in the production process of liquid polycarbosilane according to this utility model;

[0020] Figure 3 This is a top view of the threaded pressure block of a barrel-type trichlorosilane discharge device for the production process of liquid polycarbosilane according to this utility model;

[0021] Figure 4 This is a top view of the threaded seat of a barrel-type trichlorosilane discharge device for the production process of liquid polycarbosilane according to this utility model. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a barrelled trichlorosilane discharge device for the production process of liquid polycarbosilane includes a trichlorosilane built-in barrel 4, a pneumatic diaphragm pump 30 connected to the trichlorosilane built-in barrel 4, and a storage tank 5 connected to the pneumatic diaphragm pump 30. A connecting pipe is provided between the trichlorosilane built-in barrel 4 and the pneumatic diaphragm pump 30. The connecting pipe includes a liquid extraction pipe 26 extending into the trichlorosilane built-in barrel 4. The liquid extraction pipe 26 is connected to the trichlorosilane built-in barrel 4 through a barrel lid sealing device. The barrel lid sealing device 20 includes a threaded seat 24, a threaded pressure block 21, and a stainless steel gasket 22. The threaded seat 24 is connected to the trichlorosilane built-in barrel 4, and a PTFE gasket 25 is provided between the two. When the stainless steel gasket 22 and the O-ring 23 are embedded into the threaded seat 24, the threaded pressure block 21 is threadedly connected to the threaded seat 24. The O-ring is made of silicone or perfluoroether. This structure, with its designed lid sealing device, ensures gas tightness, preventing external leakage that could affect the environment and pose health and safety hazards to employees.

[0028] like Figure 1 As shown, the connecting pipeline also includes a first stainless steel fluoropolymer-lined hose 33 connected to the pneumatic diaphragm pump 30 via an inlet valve 31, and the other end of the first stainless steel fluoropolymer-lined hose 33 is connected to the liquid extraction pipe 26 via a flange; the other end of the pneumatic diaphragm pump 30 is connected to the storage tank 5 via a second stainless steel fluoropolymer-lined hose 34, and an outlet valve 32 is provided on the side of the pneumatic diaphragm pump 30 near the second stainless steel fluoropolymer-lined hose 34; the lid of the trichlorosilane built-in tank 4 is provided with a liquid extraction port for threaded connection of the threaded seat 24.

[0029] like Figure 1 As shown, a pressure balancing device is installed on the trichlorosilane built-in tank 4. The gas supply pipe 15 is a PU hose, and the gas supply pipe 15 is connected to the trichlorosilane built-in tank 4 by a fastening device. The pressure balancing device includes a three-way connector 11 connected to the trichlorosilane built-in tank 4 and a gas supply pipe 15 connected to the three-way connector 11. A first ball valve 12 is installed at the top port of the three-way connector 11, and a second ball valve 17 is installed at the side port of the three-way connector 11. A pressure gauge 14 is connected to the first ball valve 12, and the other end of the second ball valve 17 is connected to a nitrogen pressure regulating valve 16 through the gas supply pipe 15. A quick-connect gas pipe 13 is installed between the second ball valve 17 and the gas supply pipe 15. A vent is opened on the lid of the trichlorosilane built-in tank 4, and the bottom port of the three-way connector 11 is threaded to the vent. With this structure, by installing a pressure balancing device on the trichlorosilane built-in tank 4, a slight positive pressure and pressure balance are ensured during the liquid extraction process.

[0030] In this embodiment, the pneumatic diaphragm pump is a corrosion-resistant pneumatic diaphragm pump, the liquid extraction tube is made of PE, and the threaded seat and threaded pressure block are both made of 304 stainless steel.

[0031] In practical use:

[0032] Micro-positive pressure and pressure balance: Configure a three-way connector 11 according to the vent. Install a first ball valve 12 and a second ball valve 17 on the two ends of the three-way connector 11 respectively. The first ball valve 12 and the second ball valve 17 are then connected to the quick-connect 13 of the air pipe and the pressure gauge 14 respectively. The PU gas source pipe 15 is connected to the on-site nitrogen pressure regulating valve 16 for air intake. After the pressure regulating valve is adjusted, the pressure of the nitrogen inert gas is about 0.02Mpa to 0.05Mpa and then filled into the trichlorosilane built-in tank 4. During the liquid extraction process, observe the pressure of the pressure gauge 14 to determine and select the pressure range to maintain a constant micro-pressure in the tank.

[0033] Leak-proof sealing: During installation, the liquid extraction pipe 26 is inserted into the bottom of the trichlorosilane inner tank 4 after passing through the sealing device of the tank lid. The external thread of the threaded seat 24 is wrapped with PTFE tape and tightened to the liquid extraction port to form a seal. The threaded pressure block 21 is tightened, and the O-ring 23 is pressed through the stainless steel gasket 22 to form a seal against the outer circumferential wall of the liquid extraction pipe 26. The design of the stainless steel gasket 22 can prevent the threaded pressure block 21 from directly rubbing against the O-ring 23 and damaging the O-ring 23.

[0034] Discharge of liquid from tank: The combination of pneumatic diaphragm pump 30, inlet and outlet stainless steel ball valves and stainless steel fluoropolymer-lined hoses, under the slight positive pressure inside the trichlorosilane tank 4 and the suction state of pneumatic diaphragm pump 30, discharges the liquid from the tank to the storage tank 5.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for discharging trichlorosilane in drums during the production of liquid polycarbosilane, characterized in that: Its structure includes a trichlorosilane internal tank, a pneumatic diaphragm pump connected to the trichlorosilane internal tank, and a storage tank connected to the pneumatic diaphragm pump. A connecting pipe is provided between the trichlorosilane internal tank and the pneumatic diaphragm pump. The connecting pipe includes a liquid extraction pipe extending into the trichlorosilane internal tank. The liquid extraction pipe is connected to the trichlorosilane internal tank through a tank lid sealing device. The tank lid sealing device includes a threaded seat, a threaded pressure block, and a stainless steel gasket. The threaded seat is connected to the trichlorosilane internal tank, and a PTFE gasket is provided between the two. When the stainless steel gasket and the O-ring are embedded into the threaded seat, the threaded pressure block is threadedly connected to the threaded seat.

2. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 1, characterized in that: The connecting pipeline also includes a first stainless steel fluoropolymer-lined hose connected to the pneumatic diaphragm pump via an inlet valve, and the other end of the first stainless steel fluoropolymer-lined hose is connected to the liquid extraction pipe via a flange.

3. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 1, characterized in that: The other end of the pneumatic diaphragm pump is connected to the storage tank via a second stainless steel fluoropolymer-lined hose, and an outlet valve is provided on the side of the pneumatic diaphragm pump near the second stainless steel fluoropolymer-lined hose.

4. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 1, characterized in that: The lid of the trichlorosilane internal tank is provided with a liquid extraction port for threaded connection of a threaded seat.

5. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 1, characterized in that: The trichlorosilane internal tank is equipped with a pressure balancing device.

6. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 5, characterized in that: The pressure balancing device includes a three-way connector connected to the trichlorosilane built-in tank and a gas source pipe connected to the three-way connector. The top port of the three-way connector is provided with a first ball valve, and the side port of the three-way connector is provided with a second ball valve. A pressure gauge is connected to the first ball valve, and the other end of the second ball valve is connected to a nitrogen pressure regulating valve through the gas source pipe.

7. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 6, characterized in that: A quick-connector for the air pipe is provided between the second ball valve and the air source pipe.

8. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 6, characterized in that: The lid of the trichlorosilane inner tank has a vent, and the bottom port of the tee connector is threaded to the vent.

9. A discharge device for barrelled trichlorosilane in the production process of liquid polycarbosilane according to claim 6, characterized in that: The gas supply pipe is a PU flexible hose.

10. The device for discharging trichlorosilane in drums during the production process of liquid polycarbosilane according to claim 1, characterized in that: The pneumatic diaphragm pump is a corrosion-resistant pneumatic diaphragm pump, the liquid extraction tube is made of PE, and the threaded seat and threaded pressure block are both made of 304 stainless steel.

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